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Wednesday, September 30, 2020


Python sample applications : An app for the programming novices.

This app is full of pattern and different Python programs. similarly to this, there is a lot of take a look at stuff associated with Python programming as nicely.

programs to print the numbers or symbols in unique patterns (e.g. ASCII art -pyramid, waves etc.), are one of the frequently asked interview/exam packages basically for Freshers. that is so due to the fact these applications check the logical capability and coding abilities which are vital for any software program engineer.
This app is very beneficial for know-how how loops can be used to generate those different ASCII art styles & additionally for other simple concepts of Python with the help of applications.
What is Python programming?
Python is a excessive-level programming language used for standard-motive software program engineering. It’s a server facet language – this means that it runs on the server, and is responsible for processing the good judgment at the back of person inputs, interacting with databases and other servers, etc.
to start with evolved in the past due 1980’s by Guido Van Rossum, Python has been round for many years alongside other server facet languages like Java and C. Van Rossum modeled Python after the English language, getting rid of unnecessary syntax to make it easier to examine and write than other programming languages.

Python is an open-sourced language like Java (our different fave programming language), and in latest years has increased in reputation because of its use in facts technology. Python additionally has a strong network round machine getting to know, records modeling, statistics evaluation and synthetic intelligence (AI), with sizeable assets and libraries constructed for those functions.
And yes, the rumors are authentic. Python is named after the British comedy organization Monty Python.
indeed if making a decision to study Python, you shall code with the electricity of many men, Sir Knight.

Core features

250+ sample printing applications which includes

⦁ symbol patterns
⦁ wide variety styles
⦁ character styles
⦁ collection styles
⦁ Spiral patterns
⦁ Wave-style patterns
⦁ Pyramid patterns
⦁ complex styles

250 different Python applications inclusive of
⦁ wellknown utility applications
⦁ fundamental applications
⦁ elegance-item
⦁ Inheritance
⦁ Module
⦁ Exception dealing with
⦁ listing
⦁ Tuple
⦁ Set
⦁ Dictionaries
⦁ functions (def)
⦁ Sorting - searching
⦁ Trick applications

★ Python look at Stuff ★

⦁ brief advent to Python language.
⦁ application regions, capabilities, deserves, etc.
⦁ contrast of Python with different languages.
⦁ One liner definitions: widespread programming phrases.
⦁ Operator priority table
⦁ Python key phrases
⦁ ASCII table
⦁ Programming principles tutorials

(⦁⦁⦁) clean to use and execution environment (⦁⦁⦁)

✓ sample simulator - Run pattern with dynamic enter
✓ pattern category clear out
✓ alternate text size
✓ proportion code feature
✓ Video rationalization (in Hindi): To apprehend the common sense that works in the back of the ASCII pattern applications.

Study Python Offline is a an smooth to use, user-friendly platform to learn Python. Get started in Python with particular and to the factor Python tutorials which might be clean to grasp and understand.
Python is an interpreted, general-purpose programming language, which is one of the most popular choices for modern software development. Why?
Firstly, it’s modular – i.e. it can be easily integrated with other technologies and solutions.
Secondly, it’s open-source. There’s a vibrant community of developers who contribute to the development of the technology, and the Python Software Foundation oversees the quality and the direction in which the language is going.
Thirdly, Python is ‘interpreted’, which means it's translated to machine code right before the program is launched. This facilitates writing portable and universal programs, which are easier to use on different operating systems.
These are just some of the reasons which we dive into in this post.
Before we analyze the pros and cons of choosing Python for your project, let’s take a quick look at how it all started and give you a rough course on the most popular Python terms.
A short history of Python
Python was created in the early 1990s by Dutch programmer Guido van Rossum who happened to be a massive fan of the Monty Python’s Flying Circus and a British sketch comedy series created by Monty Python also known as “the Pythons”. Guido named the programming language “Python” as a tribute to his favorite comedians.
Here are a few more interesting Python facts worth knowing.
It is the fourth most used language – according to Stack Overflow’s 2020 survey, it’s used by 44.1% of developers. It’s also the third “most loved” language with 66.7% of developers admitting that it’s their favorite language.
It’s becoming increasingly popular in Machine Learning and Big Data – two emerging technologies that attract a lot of global interest. This further explains Python’s growing popularity.

it's miles a full bundle for Python programming. Its consists of tutorials to study, mcqs to test your know-how, coding questions to enhance your common sense and get used to the Python fashion of coding and final but not the least a light-weight Interpreter so that you can exercise Python programming as you analyze.

This app no longer simplest focuses on coding, but additionally helps to bolster your logic via going via data systems and algorithms and the way these records systems are applied

You study from simple concepts to more boost ideas. i.e. algorithms and facts systems the usage of Python programming
study Python Offline- tutorial and Programming provides a unique coding floor for you, where you could check your very own coding capabilities as you study

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No previous programming experience is wanted

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topics covered:

Variables and types
Shallow and Deep replica
global and local Variable
String Formatting
basic String Operations
Recursive features
training and objects

data structures and Algorithms
Linear search
Binary seek
Bubble kind
choice type
Insertion type
Shell kind
timber illustration
bushes Traversals
Graphs illustration
Graphs Traversals

Tuesday, September 29, 2020


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Exercise 118

The following dictionary contains a student's math scores:
scores = {'score1' : 16, 'score2' : 14, 'score3' : 17}
update the notes dictionary by adding the average of scores.


scores = {'score1' : 16, 'score2' : 14, 'score3' : 17}

# initializing the average of scores
average = 0
# browsing through all items in dictionary
for key , value in scores.items():
    average = average + scores[key]
average = average/3
scores['avaerage'] = average
# Testing program
print("The updated dictionary is : scores = " , scores) 
# display : The updated dictionary is : scores =  {'score1': 16, 'score2': 14, 'score3': 17, 'avaerage': 15.666666666666666} 
All Python Dictionary Exercises

Younes Derfoufi

Exercise 117

Write a python algorithm as function that verify if a key is present in given dictionary or note


# define a dictionary d
d = {'a' : 13 , 'b' : 7 , 'c' : 3 , 'd' : 5 , 'e' : 23 , 'f' : 17 , 'g' : 8 , 'h' : 11}

# define a function that test if a given key is present in d or not
def is_key_in_d(key):
    if key in d:
        return True
        return False
# Testing algorithm
print(is_key_in_d('c')) # display : True
print(is_key_in_d('m')) # display : False

Younes Derfoufi

What's Python? In technical terms, Python is an item-orientated, excessive-level programming language with incorporated dynamic semantics generally for internet and app development. it is extraordinarily attractive within the area of fast software development as it gives dynamic typing and dynamic binding alternatives. Python is exceedingly simple, so it’s clean to research since it requires a unique syntax that focuses on readability. developers can examine and translate Python code much simpler than other languages. In turn, this reduces the value of software maintenance and improvement as it lets in teams to paintings collaboratively without tremendous language and enjoy obstacles. additionally, Python supports using modules and programs, because of this that programs may be designed in a modular style and code may be reused throughout a ramification of initiatives. once you’ve advanced a module or package you need, it could be scaled for use in different initiatives, and it’s easy to import or export those modules. one of the most promising benefits of Python is that each the usual library and the interpreter are available freed from rate, in both binary and supply shape. there is no exclusivity either, as Python and all of the necessary gear are to be had on all main structures. consequently, it's far an engaging alternative for builders who don’t want to fear approximately paying excessive improvement fees. Apprendre los angeles syntaxe du langage sur des exemples de code spécifiques. remark obtenir une sous-chaîne ? remark déclarer une méthode généralisée ? Ceux-ci et plus de four hundred d'autres exemples de code pour Python three et square sont disponibles dans l'application.

Monday, September 28, 2020


About QPython 3L
QPython is the Python engine for android. It incorporates a few awesome functions consisting of Python interpreter, runtime environment, editor, QPYI and SL4A library. It makes it smooth so that it will use Python on Android. And it is free.
QPython already has thousands and thousands of customers worldwide and it is also an open supply project.
For extraordinary usage scenarios, QPython has two branches, specifically QPython Ox and 3x.
QPython Ox is in particular aimed at programming beginners, and it affords more friendly functions for novices.
this is the QPython 3L, it's far specifically for knowledgeable Python users, and it affords a few advanced technical capabilities.
- Offline Python three interpreter: no net is needed to run Python applications
- It helps walking a couple of sorts of tasks, which include: console program, SL4A program, webapp software
- handy QR code reader for shifting codes in your cellphone
- QPYPI and a custom repository for prebuilt wheel packages for more desirable medical libraries, such as numpy, scipy, matplotlib, scikit-research and so on
- clean-to-use editor
- integrated & extended SCRIPT LAYER FOR ANDROID LIBRARY (SL4A): IT helps you to power THE ANDROID paintings WITH PYTHON
- accurate documentation and customer service

# SL4A capabilities
With SL4A capabilities, you may use Python programming to control Android work:

- Android Apps API, including: software, interest, purpose & startActivity, SendBroadcast, PackageVersion, gadget, Toast, Notify, Settings, alternatives, GUI
- Android resources manager, such as: contact, area, phone, Sms, ToneGenerator, WakeLock, WifiLock, Clipboard, NetworkStatus, MediaPlayer
- 0.33 App Integrations, which include: Barcode, Browser, SpeechRecongition, SendEmail, TextToSpeech
- Hardwared supervisor: Carmer, Sensor, Ringer & Media volume, screen Brightness, Battery, Bluetooth, SignalStrength, WebCam, Vibrate, NFC, USB

[ API Documentation Link ]

[ API Samples ]

it could REQUIRE THE BLUETOOTH / area / READ_SMS / SEND_SMS / CALL_PHONE AND other PERMISSIONS, so you CAN software ITH those features. QPYTHON WILL no longer USE those PERMISSIONS IN history.

in case you GET EXCEPTION IN RUNTIME even as using SL4A API, PLEASE check whether THE applicable PERMISSIONS in the system SETTINGS ARE ENABLED.

# how to Get expert customer support
Please follow the guide to get aid

[ QPython community ]

[ FAQ ]
A: Why cannot i take advantage of the SMS API of SL4A
Q: due to the fact Google Play and some app stores have strict requirements on the permissions of apps, in QPython 3x, we use x to distinguish branches with specific permissions or appstores. for example, L method restricted and S manner sensitive.
from time to time you can't use the corresponding SL4A APIs because the model you mounted does no longer have the corresponding permissions, so that you can remember update what you've got established with the right one.

Younes Derfoufi

Sunday, September 27, 2020

The intention of this app is to introduce deep learning enthusiast to pc vision, beginning from basics and then turning to extra modern-day deep getting to know models. Deep getting to know for computer vision app will cowl both photo and video recognition, along with picture type and annotation, item reputation and picture search, numerous object detection strategies, movement estimation, item tracking in video, human movement popularity, and in the end picture stylization, modifying and new picture generation. In path assignment, students will learn how to construct face popularity and manipulation device to recognize the inner mechanics of this generation, in all likelihood the most renown and often confirmed in movies and tv-shows instance of laptop vision and AI.
present day most famous machine studying algorithms are used in this utility. each set of rules is in my opinion coded with python programming language and explained with comment strains.
observe : The advertisements come a little for my studies paintings.

1 - About JSON files

JSON (JavaScript Object Notation) is a popular and standard data format used to represent and store structured data made up of attribute-value pairs similar to a Python dictionary. It is common to transmit and receive data between a server and a web application in JSON format. Don't worry though: JSON has long since become language independent and exists as its own standard, so luckily we can skip JavaScript to process json files.

Example: json file describing a person

{"name": "Albert",
"email": "",
"leisure": ["Sport", "Cinema", "Reading", "Travel"]
To work with JSON, we must use the json module of Python. To do this, you must import the module before you can use it:

What's Python?
Python is an open supply, pass-platform, free programming language that is each powerful and smooth to examine. it's miles extensively used and supported. To examine extra about Python, see

Python changed into brought to the ArcGIS community at version for the reason that then, it's been conventional because the scripting language of choice for geoprocessing customers and continues to expand. each model has bolstered the usage of Python, giving you greater functions and a richer, greater consumer-friendly interface.

ESRI has fully adopted Python for ArcGIS and considers Python to be the language that meets the wishes of the person community. right here are some of the advantages of Python:
- clean to learn, it's miles specifically well suitable to novices at the same time as being perfect for experts
- quite scalable, it is suitable for big projects in addition to small unique packages called scripts
- portable, multiplatform.
- Embeddable (making ArcGIS scripting feasible)
- solid and validated
- A big consumer network

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Saturday, September 26, 2020


Game programming, advent from scratch: for kids and teenagers, in addition to their mother and father and instructors! element two. Designed for a extensive range of readers and students of programming. Examples using Tkinter - constructing modern windowing interfaces.
Writing games: studying Python programming with the aid of writing easy video games that demonstrate programming capabilities.


Python is an integratedterpreted, general-cause programmbuilt-ing language, that's one of the maximum popular picks for contemporary software improvement. Why?
firstly, it’s modular – i.e. it may be easily built-integratedintegrated with different technologies and answers.
Secondly, it’s open-source. There’s a vibrant community of builders who contribute to the improvement of the technology, and the Python software program foundation oversees the high-quality and the route built-inintegrated the language goesintegrated.
Thirdly, Python is ‘built-interpreted’, which means it is translated to machbuiltintegrated code right earlier than the program is launched. This enables writbuilt-ing portable and prevalent applications, which might be less difficult to apply on built-inintegrated workbuiltintegrated structures.
those are simply a number of the motives which we dive integratedto built-inbuiltintegrated put up.
before we exambuiltintegrated the pros and cons built-inof choosbuiltintegrated Python built-in venture, permit’s take a short built-in how it all commenced and come up with a tough route at the maximum famous Python phrases.
Pydroid three is the maximum clean to use and effective educational Python 3 IDE for Android.

- Offlbuilt-ine Python three.eight integratedterpreter: no built-internetintegrated is needed to run Python applications.
- Pip package deal supervisor and a custom repository for prebuilt wheel programs for better medical libraries, built-includes numpy, scipy, matplotlib, scikit-study and jupyter.
- OpenCV is now to be had (on devices with Camera2 API support). *
- TensorFlow and PyTorch are also available. *
- Examples available out-of-the-contabuiltintegrated for faster built-inintegrated.
- entire Tkbuilt-inter support for GUI.
- full-featured Termintegratedal Emulator, with a readlintegratede assist (available integrated pip).
- 7fd5144c552f19a3546408d3b9cfb251 C, C++ or even Fortran compiler designed builtintegrated for Pydroid 3. It lets Pydroid three construct any library from pip, despite the fact that it's far built-inthe use of native code. you can additionally build & installation dependencies from a command lbuilt-ine.
- Cython help.
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- Kivy graphical library with integrated new SDL2 backend.
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Editor functions:
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- prolonged keyboard bar with all symbols you want to software built-in Python.
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- Tabs.
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* capabilities marked through asterisk are to be had integrated premium model handiest.

brief guide.
Pydroid three requires at least 250MB loose integrated reminiscence. 300MB+ is usually recommended. greater if you are built-in heavy libraries along with scipy.
To run debug built-inityintegrated breakpointegratedt(s) clickintegratedg on integrated range.
Kivy is detected with “import kivy”, “from kivy“ or "#Pydroid run kivy”.
PyQt5 is detected with “import PyQt5”, “from PyQt5“ or "#Pydroid run qt”.
The identical for sdl2, tkintegratedter and pygame.
there may be a unique mode "#Pydroid run termbuilt-inal" to make sure your program runs built-in termbuilt-inal mode (this is useful with matplotlib that built-in runs built-in GUI mode)

Why are some libraries top class-simplest?
these libraries had been extremely difficult to port, so we needed to ask every other developer to do this. under settlement, his forks of these libraries are furnished to the top class users best. if you would really like to developintegrated loose forks of those libraries - contact us.

Take a element integrated improvement of Pydroid three by way of reportintegratedg built-in or offerbuiltintegrated characteristic requests to us. We appreciate that.

As Pydroid 3 built-incipal built-in is to assist user learn Python 3 programmbuilt-ing language, our first priority is portintegratedg clinical libraries (so built-ineintegrated-related libraries are ported handiest when they're used as dependencies of a few different academic package).

prisonintegrated statistics.
a few bintegratedaries integrated Pydroid 3 APK are certified underneath (L)GPL, electronic mail us for the source code.
GPL pure Python libraries bundled with Pydroid 3 are taken builtintegrated to be combuilt-ing integrated supply code shape already.
Pydroid 3 doesn’t package deal any GPL-licensed native modules to keep away from automated import of them. The well-known builtintegrated of such library is GNU readlintegratede, that may be mounted built-ing pip.
Samples to be had built-inside theintegrated utility are loose for instructional utilization with one exception: they, or their built-inoffintegrated works, can not be utilized in any competintegratedg merchandise (integrated any manner). built-in are built-in, whether your app is built-in this limit, built-inuallyintegrated ask for a permission thru email.
Android is a hallmark of Google Inc.

A quick records of Python
Python turned into created inside the early 1990s by means of programmer Guido van Rossum who occurred to be a massive fan of the Monty Python’s Flying Circus and a British cartoon comedy series created by way of Monty Python also called “the Pythons”. Guido named the programming language “Python” as a tribute to his preferred comedians.
right here are a few more exciting Python facts really worth understanding.
it's far the fourth most used language – in keeping with Stack Overflow’s 2020 survey, it’s used by 44.1% of builders. It’s additionally the 1/3 “most cherished” language with sixty six.7% of builders admitting that it’s their preferred language.
It’s becoming an increasing number of famous in device studying and big statistics – rising technology that entice a variety of worldwide hobby. This similarly explains Python’s developing recognition.
Python terms well worth knowing there are many Python terms that may, at the start, seem quite intimidating to a non-technical individual. among the famous terms you’ll listen in reference to Python relate to its frameworks, libraries, gadgets, and instructions.
right here’s an overview of the maximum important Python phrases and what they stand for.
Python frameworks.
A framework is a wireframe that serves as the inspiration for software program improvement. developers use them to construct programs for a particular platform. As a result, they don’t must “reinvent the wheel” whenever they paintings on a mission.
There are numerous famous Python frameworks and microframeworks really worth understanding about.
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Python programs path covers the following topics:
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Programming Languages

What is Python? In technical phrases, Python is an object-oriented, high-degree programming language with incorporated dynamic semantics frequently for web and app development. it's miles extremely appealing within the discipline of speedy application development because it gives dynamic typing and dynamic binding alternatives.
Python is fairly easy, so it’s easy to learn since it calls for a completely unique syntax that specializes in clarity. developers can examine and translate Python code a lot simpler than other languages. In turn, this reduces the fee of software maintenance and development as it lets in groups to paintings collaboratively without considerable language and enjoy boundaries. moreover, Python supports the use of modules and packages, this means that that packages may be designed in a modular style and code can be reused throughout a variety of initiatives. when you’ve advanced a module or bundle you want, it is able to be scaled to be used in other initiatives, and it’s smooth to import or export those modules.
one of the most promising blessings of Python is that both the standard library and the interpreter are to be had freed from charge, in both binary and source form. there may be no exclusivity both, as Python and all the vital gear are available on all major platforms. therefore, it's miles an attractive option for builders who don’t need to fear approximately paying high development costs.
How is Python Used?
Python is a general-cause programming language, which is any other manner to say that it may be used for almost the entirety. most importantly, it is an interpreted language, this means that that the written code is not honestly translated to a computer-readable format at runtime. while, most programming languages do this conversion before the program is even run. This type of language is also known as a “scripting language” as it was to start with intended for use for trivial projects.
The concept of a “scripting language” has changed drastically on the grounds that its inception, because Python is now used to write down massive, industrial fashion packages, as opposed to simply banal ones. This reliance on Python has grown even greater so as the net won popularity. A big majority of internet applications and platforms depend upon Python, together with Google’s search engine, YouTube, and the net-orientated transaction machine of the the big apple inventory trade (NYSE). you understand the language have to be pretty extreme when it’s powering a inventory alternate device.

Python Pandas
Pandas is an open-source, BSD-certified Python library supplying high-overall performance, easy-to-use statistics systems and data analysis tools for the Python programming language. Python with Pandas is used in a extensive variety of fields inclusive of academic and business domain names together with finance, economics, data, analytics, and so this tutorial, we can examine the diverse features of Python Pandas and a way to use them in practice.

topics protected in this App are listed beneath
Pandas - home
Pandas - creation
Pandas - environment Setup
Pandas - creation to facts structure
Pandas - series
Pandas - DataFrame
Pandas - Panel
Pandas - fundamental capability
Pandas - Descriptive records
Pandas - characteristic utility
Pandas - Reindexing
Pandas - new release
Pandas - Sorting
Pandas - operating with text facts
Pandas - options & Customization
Pandas - Indexing & choosing statistics
Pandas - Statistical functions
Pandas - Window functions
Pandas - Aggregations
Pandas - missing statistics
Pandas - GroupBy
Pandas - Merging/joining
Pandas - Concatenation
Pandas - Date functionality
Pandas - Timedelta
Pandas - express facts
Pandas - Visualization
Pandas - IO gear
Pandas - Sparse records
Pandas - Caveats & Gotchas
Pandas - comparison with square

learn Python Offline is a an smooth to apply, consumer-pleasant platform to study Python. Get began in Python with specific and to the factor Python tutorials which might be clean to understand and understand. it is a complete package for Python programming. Its contains tutorials to analyze, mcqs to check your expertise, coding questions to enhance your logic and get used to the Python fashion of coding and final but now not the least a light-weight Interpreter so you can exercise Python programming as you study. Python is a popular preferred-reason programming language that can be used for a huge variety of packages. It consists of excessive-level facts systems, dynamic typing, dynamic binding, and lots of extra capabilities that make it as beneficial for complicated application development as it is for scripting or "glue code" that connects components collectively. it could also be extended to make machine calls to almost all running systems and to run code written in C or C++. due to its ubiquity and ability to run on almost each gadget architecture, Python is a accepted language found in a variety of different packages. This app not handiest specializes in coding, however additionally helps to reinforce your good judgment by means of going through data systems and algorithms and the way these records systems are carried out You research from fundamental principles to more increase principles. i.e. algorithms and information systems the usage of Python programming research Python Offline- tutorial and Programming gives a completely unique coding floor for you, in which you may take a look at your own coding talents as you study The educational training are divided into complete sections for immediate and easy mastering.
No prior programming experience is wanted

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- advance statistics structures
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Younes Derfoufi

Friday, September 25, 2020


Exercise 66

Write a Python program that extract the list of all urls from given a string s. Example if s = "You can use google or facebook" The algorithm returns the list
['' , '']


def extractURL(s):
    # initializing the list of urls:
    listURL = []
    # converting the string s into a list
    L = s.split()
    for element in L:
        if (element.startswith('https://') or element.startswith('http://')):
    return listURL

# Teting algorithm
s = "You can use google  or facebook"
print(extractURL(s)) # The output is:
# ['', '']

Younes Derfoufi
Unix -Python-courses-Solaris, Linux, FreeBSDPython-courses-python-exercises-python

Exercise 65

Write a Python program as function which takes as parameter a string s and returns True if the first character is the same as the last character of the string, False if not. Example if s = "render", the function must returns True. If s = "Python" the function returns False


def lastFirst(s):
    if len(s) == 0:
        return True
    elif s[0] == s[-1]:
        return True
        return False

# Example
print(lastFirst("render")) # display True
print(lastFirst("Python"))  # display False

Younes Derfoufi

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Table of Contents
< br /> 1. introduction
2. willpower
3. Preface
4. approximately Python
5. set up
6. First Steps
7. fundamentals
eight. Operators and Expressions
9. manage drift
10. features
11. Modules
12. statistics structures
13. problem fixing
14. item orientated Programming
15. enter and Output
sixteen. Exceptions
17. standard Library
18. extra
19. What next
20. Appendix: FLOSS
21. Appendix: approximately
22. Appendix: Revision history
23. Appendix: Translations
24. Appendix: Translation How-to
25. remarks
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Thursday, September 24, 2020

Exercise 116

From the following two lists, create a dictionary by two different methods:
keys = ['Name', 'Email', 'Phone']
values = ['Albert', '', 2225668877]
The output should be:
data = {'Name': 'Albert', 'Email': '', 'Phone': 2225668877}


First method

keys = ['Name', 'Email', 'Phone']
values = ['Albert', '', 2225668877]
data = dict(zip(keys, values))

Sconde method

keys = ['Name', 'Email', 'Phone']
values = ['Albert', '', 2225668877]
# crate an empty dictionary
data = dict({})

# building th dictionary
for i in range(0, len(keys) ):
    data[keys[i]] = values[i]

Younes Derfoufi

Exercise 115

1) - Write a python program which creates a file named data.txt and write the lines in this file: 

Name: David
Phone: 33354587 age: 27 

2) - Write a Python program that reads the data.txt file and exports its content to a dictionary:

d = {'Name': 'David', 'Email': '', 'Phone': 33354587, age ': 27}


# Question 1
import os
# we open file in write mod
file = open("data.txt" , 'w')
#writing data into the file
file.write('Name: David\nEmail:\nPhone: 33354587\nage: 27\n')
# Question 2
# create an empty dictionary that will contains the data file
d = dict({})

# now we can import the data from the data.txt file and export it into the dictionary
# open data.txt file in read mod
file = open("data.txt" , 'r')

# obtaining all content lines of data.txt file
listLines= file.readlines()
for line in listLines:
    d[line.split(':')[0]] = line.split(':')[1]

Younes Derfoufi

Exercise 114

We consider the Pythons dictionary which contains a personal data :
personalData = {'Name' : 'David' , 'Email' : '' , 'Phone' : 33354587 , age' : 27 }
Write a Python program that save data contained in personalData into a file called data.txt .


import os
personalData = {'Name' : 'David' , 'Email' : '' , 'Phone' : 33354587 , 'age' : 27 }
# we open file in write mod
file = open("data.txt" , 'w')
for key , value in personalData.items() :
    file.write(key + " : " + str(personalData[key]) + '\n')

The output will display a txt file containing the dictionary data:


Younes Derfoufi

Exercise 112

Given a dictionary d whose key values are lists. Write a Python program that transforms the dictionary d by sorting the lists. Example for the dictionary:
d = {'a1': [21, 17, 22, 3], 'a2': [11, 15, 8, 13], 'a3': [7, 13, 2, 11], 'a4': [22,14,7,9]}
The program should return the dictionary:
d = {'a1': [3, 17, 21, 22], 'a2': [8, 11, 13, 15], 'a3': [2, 7, 11, 13], 'a4': [7, 9, 14, 22]}


d = {'a1': [21, 17, 22, 3], 'a2': [11, 15, 8, 13], 'a3': [7, 13, 2, 11], 'a4': [22,14,7,9]}

# getting the dictionary values and keys by using the items() methode
for key , value in d.items():
    # sorting the list value
    # updating the dictionary d
    d[key] = value
# display result
print("The new dictionary is d = " , d)
# The output is : The new dictionary is d =  {'a1': [3, 17, 21, 22], 'a2': [8, 11, 13, 15], 'a3': [2, 7, 11, 13], 'a4': [7, 9, 14, 22]}

Younes Derfoufi

Exercise 111 || Solution

Write a Python program that asks the user to enter a text and return him a dictionary whose keys are the words of the text entered and the values are the reverse of the words that make up the text. Example for the text T = "Python is easy", the program must return the dictionary:
d = {'Python': 'nohtyp', 'is': 'si', 'easy': 'ysae'}


# ask user to type a text
T = input("Type a some text")
# convert the text to list of words
listWords = T.split(' ')
# create an empty dictionary which will contains the words contained in the text
d= dict({})

for word in listWords:
    # creating the reverse of words
    reverseWord = word[::-1]
    d[word] = reverseWord
# display obtained  dictionary d
print("The obtained dictionary is d = " , d)
# for typed text = "Python is easy", the output is:
# The obtained dictionary is d =  {'Python': 'nohtyP', 'is': 'si', 'easy': 'ysae'}

Younes Derfoufi

Exercise 110

Write a Python program that asks the user to enter a text and return a dictionary whose keys are the words of the text entered and the values are the lengths of the words that make up the text. Example for the text T = "Python is a programming language", the program must return the dictionary:
d = {'Python': 6, 'is': 3, 'a': 3, 'language': 7, 'de': 2, 'programming': 13}


# ask user to type a text
T = input("Type a some text")
# convert the text to list of words
listWords = T.split(' ')
# create an empty dictionary which will contains the words contained in the text
d= dict({})

for word in listWords:
    d[word] = len(word)
# display obtained  dictionary d
print("The obtained dictionary is d = " , d)
# If typed text is T = "Python is programming language", the output is : 
#The obtained dictionary is d =  {'Python': 6, 'is': 2, 'programming': 11, 'language': 8}

Younes Derfoufi

Exercise 109

Write a program in Python that asks the user to enter an integer n and return a dictionary whose keys are the integers 1, 2, 3, ... n and whose values ​​are the sums 1, 1+ 2, 1 + 2 + 3,... 1 + 2 + 3 + ... + n.


# create a function which calculates the sum 1 + 2 + 3 + ... + n
def sumInt(n):
    s = 0
    for i in range(1, n + 1):
        s = s + i
    return s

# create an empty dictionary which will contains the key 1 , 2 , 3 , ... , n and their values 
d= dict({})
n = int(input("Enter value of integer n"))
for i in range(1, n):
    d[i] = sumInt(i)
# display obtained  dictionary d
print("The obtained dictionary is d = " , d)
# The output is : 
#The obtained dictionary is d =  {1: 1, 2: 3, 3: 6, 4: 10, 5: 15, 6: 21}

Younes Derfoufi

Wednesday, September 23, 2020


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